Combined chair seat/backrest



FIG. 1 is a perspective view of a combined chair seat/backrest showingmy new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof; the opposite side being a mirror image ofthe shown.

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The ornamental design for combined chair seat/backrest, as shown anddescribed.